Electric telegraphic apparatus.



H. e. MARTIN. ELECTRIC TELEGRAPHIG APPARATUS. APPLICATION FILED OCT. 27, 1911 11,043,449. Patented Nov. 5, 1912.

. w W W /2 HORACE G. MARTIN,

OF EAST RUTHERFORD, NEW JERSEY.

ELECTRIC TELEGRAPHIQ APPARATUS.

at East Rutherford, in the county of Bei gen and State of have invented certain new and tric Telegraphic Apparatus, of which the following is a specification, reference being had to the drawings accompanying and forming part of the same.

ual labor than is required with the apparatus commonly used.

Referring to the accompanying drawings,

igure 1 is a plan of one embodiment of a complete apparatus embodying my invention; Fig. 2 is a side elevation partly in section on the line ww of Fig. 1, looking 3 isa plan of a pormore clearly; and Fig. 4 is a sectional elevation on the line y-y of Fig. 1, looking upward.

Considering the apparatus in greater detail, a suitable base 1 preferably of metal is provided, to which the working parts are attached. operators key-lever .2, having insulating hand pieces 3, moves from left to right on a vertical shaft 4, suitably mounted in upper and lower bearings (Figs. 1 and 2). Below lever 2 is a second lever or bar 5 which also swings from left to right upon shaft 4 and is held normally against an. adjustable stop 11 by a spring 12 whose tension may be regulated by screw 13. An upright piece 6'attached to bar 5 is so arranged that when key-lever 2-3is moved to the right bar 5 is moved in the same direction until its opposite end strikes adjustable stop 14 (F' A shaft or left to right trolled by key 2, having for convenience an attachment 24, which, however, may be integral therewith, fastened to its side, so

1 spring 7 having bearings 8 and 9 se- :ured to levers 2 and 25, respectively, and

. Specification of Letters Patent.

and thence by 36 and 34 to th Patented Nov. 5, 1912.- Serial No. 657,194. 1

having its tension regulated by screw 10,

shown In the drawings. An insulating button 28 may be inserted in the upper end (Flg. 1) of lever 25.

flat, vertical spring is secured to lever 5 and has attached to its opposite end a vibrating rod or bar 16, carrying a Weight 7 which may be slid back and forth thereon and held at any desired point by a screw 18 (Figs. 1, 2 and 3). A suitable contact device 19 is secured to and operates with said bar 16, which in the formshown is preferably a fiat spring held under a certain tension by the device 20. A stop or deadener consisting of a metal wheel or disk 21 hung loosely upon its axis is arranged to quickly stop the vibrations of bar 16 and parts connected therewith.

being connected electrically with base 1 and the latter being secured to said base but insulated therefrom. Post 34: is connected by 39. Parts 34, 36, 37, 38 and 39 are insulated from base 1 by insulation (Figs. 1 and 2). A switch 40 electrically connected to base 1 normally stands in the position shown in Fig. 1, but when the handle is moved to the left, the current passes directly through the plug 31, wires 32, post 33, base 1, switch 4 O and post 34, and the apparatus is in circuit but inoperative.

The operation of the apparatus will now be readily understood.

en the operator desires to send a message he moves key lever 23 to the right quickly till the opposite end of bar 5 strikes the stop 14 (Fig. 3). This sets bar or rod 16 and parts connected therewith vibrating horizontally upon spring 15, and causes parts 19 and 38 to make and break a series of electric contacts and send of impulses over the line to the receiving station, the current flowing through, one of the wires 32, post 33, base 1, shaft 4, lever 5, spring 15, bar 16, contacts 19 and 38, post 37, e other wire. These impulses produce the dots of a telegraphic message. When a single dot is desired, key 2 is .moved to the right and rea series turned at once either by the operator or by 1 spring 12. By holding said lever in its right longer or shorter time, a greater or smaller number of dots, as dethe vibrations of bar 16 and contacts 19 and 38. When the operator desires to send an impulse over the line corresponding to a dash of a telegraphic message, he moves key 2-3 to the left, which causes the attachment 2st to swing small lever 25 upon shaft 26 so that its opposite end or button 28 brings contacts 19 and 38 together closing the same circuit as pointed out above. A repetition of this movement causes any desired number of dashes. \Vhen key 2-3 is moved to the right, parts 5, 6, 7 8, 9, 10, 15, 16, 17, 1s, 19, 20, 24,25, 26, 27 and 28 are also moved, and spring 12 is compressed and returns the parts to normal position when pressure on said key is removed. lVhen said key is moved to the left, parts 8, 9, 10, 24, 25, 27, 28 and 19 are moved, and spring 7 is compressed and returns the parts to normal position as soon as pressure on the key is removed.

I claim:

In an electric telegraphic apparatus, the combination of an operators key movable in two directions, a lever actuated by movement of said key in one direction but remaining stationary during its other move- 5 ment, a vibrator actuated by movement 0 said lever, a stationary electric contact and a movable electric cont-act carried by said vibrator and adapted to produce the dots of a telegraphic message when the operators key is moved in one direction, and means for forcing the movable against the stationary contact to produce the dashes of a telegraphic message when said key is operated in the other direction.

HORACE G. MARTIN. Witnesses:

MURRAY CORRINGTON, CHARLES EISENHUT. 

